When a player logs out while on a horse, the horse duplicates when the player logs back in.
If it's a donkey or mule, all the items will be duplicated as well.
MC-16186
Tamed horses duplicate in multiplayer when a player logs out while still on the horse
Resolved
Duplicate
0
37th Duplicate of MC-13737, please use the search function to see if your bug has already been submitted. Currently over 56% of tickets are being closed as duplicate.